package collection;

import java.util.*;

public class SortInteger {
    public static void main(String[] args) {
        Random rand = new Random();
        List<Integer>list = new ArrayList<>();
        for (int i = 0;i<10;i++){
            list.add(rand.nextInt(100));
        }
        System.out.println("list原始数据："+list);

        Collections.sort(list);//自然排序（从小到大）
        System.out.println("list排序后数据："+list);


        Collections.reverse(list); //反转list集合(数据已经变了--大到小)
        System.out.println("list反转后数据:"+list);
        System.out.println("第1个元素为:"+list.get(0)); //大

    }
}
